Câu hỏi: Thank you very much _____ what you have done for me.

A. of

B. up

C. for

D. about

Câu 1: Helen had said goodbye to everybody in the class _____ she left for the hometown.

A. after

B. before

C. and

D. for

Câu 2: She'll come home ______ April.

A. on

B. in

C. at

D. for

Câu 3: _______ general, I found zoology to be an easier subject than botany.

A. On

B. In

C. At

D. With

Câu 4: They came to visit us _____ my birthday.

A. at

B. on

C. to

D. of

Câu 5: We are her to provide you _____ the best service possible.

A. of

B. with

C. to

D. for

Câu 6: John F. Kenedy was the first President to be born ____ the twentieth century.

A. in

B. on

C. at

D. up